阅读说明：本技术 一种低噪音行星齿轮减速机 (Low-noise planetary gear speed reducer ) 是由 方为堂 于 2019-10-28 设计创作，主要内容包括：本发明涉及减速机技术领域,提供了一种低噪音行星齿轮减速机,包括电机和与电机的输出轴连接的一级齿轮,所述输出轴的外表面设有第一连接部,所述一级齿轮设有用于匹配套接所述输出轴的内腔,所述内腔上设有用于与所述第一连接部匹配啮合的第二连接部。本发明将现有技术中的行星齿轮减速机在高速级把一级齿轮与电机轴做成一体的结构改为分体式,通过电机输出轴外表面的第一连接部与一级齿轮内腔的第二连接部啮合的方式,来支撑一级齿轮与电机之间的连接,有利于降低电机在高速运转时给一级齿轮带来的振动及噪音,且通过该分体式的结构,能够便于一级齿轮在损坏时及时更换,设计合理,实用便捷。(The invention relates to the technical field of speed reducers, and provides a low-noise planetary gear speed reducer which comprises a motor and a primary gear connected with an output shaft of the motor, wherein a first connecting part is arranged on the outer surface of the output shaft, the primary gear is provided with an inner cavity used for being matched and sleeved with the output shaft, and a second connecting part used for being matched and meshed with the first connecting part is arranged on the inner cavity. The planetary gear reducer changes the structure that the primary gear and the motor shaft are integrated into a whole at a high speed stage into a split type, supports the connection between the primary gear and the motor in a mode that the first connecting part on the outer surface of the motor output shaft is meshed with the second connecting part in the inner cavity of the primary gear, is favorable for reducing vibration and noise brought to the primary gear when the motor runs at a high speed, and can facilitate the timely replacement of the primary gear when the gear is damaged through the split type structure.)

1. The utility model provides a low noise planetary gear speed reducer, includes motor and the one-level gear with the output shaft of motor, characterized by, the surface of output shaft is equipped with first connecting portion, the one-level gear is equipped with and is used for the matching to cup joint the inner chamber of output shaft, be equipped with on the inner chamber be used for with first connecting portion match the second connecting portion of meshing.

2. The low-noise planetary gear reducer according to claim 1, wherein the first connecting portion is an external gear, and the second connecting portion is an internal gear that meshes with the external gear.

3. A low-noise planetary gear reducer according to claim 2, wherein the pitch circle diameters of the external gear and the internal gear are equal.

4. The planetary gear reducer according to claim 1, wherein the first connecting portion is a trapezoidal protrusion, the number of the trapezoidal protrusions is 3, the trapezoidal protrusions are evenly spaced on the outer surface of the output shaft, and the second connecting portion is a connecting groove that is engaged with the trapezoidal protrusion.

Technical Field

The invention relates to the technical field of speed reducers, in particular to a low-noise planetary gear speed reducer.

Background

A plurality of sun gears are arranged in a general planetary gear reducer to connect a planetary flange in a planetary gear box with a motor output shaft, in the prior art, a primary gear and a motor shaft are integrated at a high-speed stage of the planetary gear reducer, the main source of noise of the planetary gear reducer and vibration of the primary gear are generated, and the replacement of the primary gear is troublesome after the primary gear is damaged. Therefore, how to design a motor connecting structure of a planetary gear reducer, which can reduce the noise of the planetary gear reducer motor and can easily replace a primary gear, is a technical problem which needs to be solved urgently in the industry.

Disclosure of Invention

In order to solve the problems, the invention provides a low-noise planetary gear reducer.

The purpose of the invention is realized by adopting the following technical scheme:

the invention provides a low-noise planetary gear speed reducer which comprises a motor and a primary gear connected with an output shaft of the motor, wherein a first connecting part is arranged on the outer surface of the output shaft, the primary gear is provided with an inner cavity used for being matched and sleeved with the output shaft, and a second connecting part used for being matched and meshed with the first connecting part is arranged on the inner cavity.

In one embodiment, the first connecting portion is an external gear, and the second connecting portion is an internal gear that meshes with the external gear.

In one implementation, the pitch circle diameters of the outer gear and the inner gear are equal.

In a mode that can realize, first connecting portion are trapezoidal arch, trapezoidal protruding quantity is 3, and even interval sets up on the surface of output shaft, the second connecting portion be with the spread groove of trapezoidal protruding joint.

The invention has the beneficial effects that: the planetary gear reducer changes the structure that the primary gear and the motor shaft are integrated into a whole at a high speed stage into a split type, supports the connection between the primary gear and the motor in a mode that the first connecting part on the outer surface of the motor output shaft is meshed with the second connecting part in the inner cavity of the primary gear, is favorable for reducing vibration and noise brought to the primary gear when the motor runs at a high speed, and can facilitate the timely replacement of the primary gear when the gear is damaged through the split type structure.

Drawings

The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.

FIG. 1 is a front view of a motor and its output shaft in accordance with an exemplary embodiment of the present invention; .

FIG. 2 is a side view of a motor and its output shaft in accordance with an exemplary embodiment of the present invention;

FIG. 3 is a side view of a primary gear in accordance with an exemplary embodiment of the present invention;

FIG. 4 is a side view of a motor and its output shaft in accordance with another exemplary embodiment of the present invention;

FIG. 5 is a side view of a primary gear in accordance with another exemplary embodiment of the present invention.

Reference numerals:

motor 1, output shaft 2, primary gear 3, first connecting portion 4, inner chamber 5, second connecting portion 6.

Detailed Description

The invention is further described with reference to the following examples.

Referring to fig. 1 to 5, an embodiment of the present invention provides a low-noise planetary gear speed reducer, including a motor 1 and a primary gear 3 connected to an output shaft 2 of the motor 1, where a first connection portion 4 is disposed on an outer surface of the output shaft 2, the primary gear 3 is provided with an inner cavity 5 for being sleeved on the output shaft 2 in a matching manner, and the inner cavity 5 is provided with a second connection portion 6 for being engaged with the first connection portion 4 in a matching manner.

According to the embodiment of the invention, the structure that the primary gear 3 and the motor 1 shaft are integrated at a high speed stage of the planetary gear speed reducer in the prior art is changed into a split type, the connection between the primary gear 3 and the motor 1 is supported in a manner that the first connecting part 4 on the outer surface of the output shaft 2 of the motor 1 is meshed with the second connecting part 6 in the inner cavity 5 of the primary gear 3, so that the vibration and the noise brought to the primary gear 3 when the motor 1 runs at a high speed are favorably reduced, and the split type structure can facilitate the timely replacement of the primary gear 3 when the primary gear 3 is damaged, and is reasonable in design, practical and convenient.

In one possible embodiment, as shown in fig. 2 and 3, the first connection portion 4 is an external gear, and the second connection portion 6 is an internal gear that meshes with the external gear. And a certain gap can be reserved between the outer gear and the inner gear in a gear meshing mode, so that the outer gear can float, and the noise is further reduced.

In one implementation, the pitch circle diameters of the outer gear and the inner gear are equal.

In a mode that can realize, as shown in fig. 4, 5, first connecting portion 4 is trapezoidal arch, trapezoidal protruding quantity is 3, and even interval sets up on the surface of output shaft 2, second connecting portion 6 be with the spread groove of trapezoidal protruding joint. The embodiment sets up the form that the connected mode is trapezoidal arch and spread groove joint, can support being connected between 1 output shaft 2 of motor and the one-level gear 3 better. Through setting up trapezoidal protruding quantity for 3 for two connecting portion structures present the triangle-shaped structure, make the connection between 1 output shaft of motor 2 and the one-level gear 3 more firm.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.